VIA-254 Tidy up APIM error logging

Error log contained a sizeable list of fields we don't need, use or that
are duplicated elsewhere in the log message.

Author: donna-belsey-nhs

src/utils/logger.ts

@@ -20,6 +20,9 @@ const REDACT_KEYS: string[] = [
   "clientAssertion",
   "client_assertion",
   "elidUri",
+  "error.config.data",
+  "error.request",
+  "error.request._requestBodyBuffers",
   "idToken",
   "id_token",
   "iss",